core, frontends: various fixes for Libervia:

- quick_app: don't fail when we can't get autodisconnect parameter
    - bridge: removed useless BridgeFrontend parent class
    - use of TypeError, unicode and list to workaround Pyjamas incompatibilities

frontends/src/quick_frontend/quick_chat.py

@@ -139,7 +139,8 @@ class Message(object):
             except KeyError:
                 log.error(u"extra data is missing user nick for uid {}".format(self.uid))
                 return ""
-        if self.parent.type == C.CHAT_GROUP or entity in contact_list.getSpecials(C.CONTACT_SPECIAL_GROUP):
+        # FIXME: converted getSpecials to list for pyjamas
+        if self.parent.type == C.CHAT_GROUP or entity in list(contact_list.getSpecials(C.CONTACT_SPECIAL_GROUP)):
             return entity.resource or ""
         if entity.bare in contact_list:
             return contact_list.getCache(entity, 'nick') or contact_list.getCache(entity, 'name') or entity.node or entity
@@ -292,7 +293,7 @@ class QuickChat(quick_widgets.QuickWidget):
     @staticmethod
     def getWidgetHash(target, profiles):
         profile = list(profiles)[0]
-        return profile + "\n" + target.bare
+        return profile + "\n" + unicode(target.bare)
 
     @staticmethod
     def getPrivateHash(target, profile):